Device for remote laying of annular nozzle ferromagnetic elements in a heat-mass transfer apparatus is made in the form of two permanent magnets placed in the same plane and connected by
a remote element, each of which is made in the form of a strip with the possibility of tight contact of its inner surface with an annular nozzle ferromagnetic element. Each of the permanent magnets is made flexible with at least one protrusion located on its outer surface. Each of the distance elements is made in the form of a removable rod with the possibility of mutual fixation of its end sections and protrusions of permanent magnets.